1 . 已知a,b满足
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd79f35ddb332b039085a7ba388b7cda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ba366db8c0477685c46d3813a2c6189.png)
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2 . 已知关于x的不等式组
只有3个整数解,则a的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced70cf95adbd5ae1169660a5a206330.png)
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3 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ ;若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
______ ;若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e72289ad66a1ffd8a65af736f8f665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8baa2ebf0f417aaf08096876d6e3d162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3848a0b286df3aee19ed2b0559acd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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4 . 用“*”表示一种新运算:对于任意正实数a、b,都有
.例如
,那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189190d9e4cd0cc28fb1feeb79a9f12a.png)
______ ,当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135c035753e3a3d0b7f00d82f08c37cf.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e4e5e013c43bde2e62b651f1e1e288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce31dc96a9469d650f823a54ecbf9cfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189190d9e4cd0cc28fb1feeb79a9f12a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135c035753e3a3d0b7f00d82f08c37cf.png)
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5 . 点P在x轴下方,且点P到x轴的距离是7,到y轴距离是8,则点P坐标是______ .
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6 . 大约公元222年我国汉代数学家赵爽为《周髀算经》一书作序时介绍了“勾股圆方图”,亦称“赵爽弦图”,如图,四个全等的直角三角形拼成大正方形
,中空的部分是小正方形
,连接
,
相交于点
,
与
相交于点
,若
,则直角三角形的边
与
之比是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0ae50d5993a332b5cddb022eaa6f1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53284d0eda1819c949e14a9950d07172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
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7 . 如图,矩形
中,连接
,延长
至点E,使
,连接
,若
,则
的度数是___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7595bdaea3dfa548c0fcfe3708387476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8171f3820a1ba29d38497a80df337072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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8 . 如图所示,
为
的中位线,点
在
上,且
,若
,
,则
的长为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243a9ae75886b75c37f88a0ba655fa31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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9 . 如图,已知数轴上A,B两点表示的数分别是a,b,化简
的结果是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/768ec952d587e59014b73c2e3d4a2843.png)
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10 . 若
和
是实数
的平方根,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a1c8b3643efaa1daac7fbbabd5bef1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c0adbbd84df799d851d0e803d09c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff8c9f0a11dcb4c6ced289085f051896.png)
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